public string MapPathPhysicalToVirtual(string?physicalPath)
{
if (physicalPath._IsEmpty())
{
return("");
}
physicalPath = UnderlayPathParser.NormalizeDirectorySeparatorAndCheckIfAbsolutePath(physicalPath);
// Remove the last directory letter
physicalPath = UnderlayPathParser.RemoveLastSeparatorChar(physicalPath);
// the examples of physicalPath:
// c:\view_root
// c:\view_root\readme.txt
// c:\view_root\abc\def\
// c:\view_root\abc\def\readme.txt
// delegating to the derive class
string virtualPath = MapPathPhysicalToVirtualImpl(physicalPath);
// the contents of virtualPath:
// '' (empty) - representing the root directory
// readme.txt
// abc\def
// abc\def\readme.txt
// converting the naming convention
virtualPath = UnderlayPathParser.ConvertDirectorySeparatorToOtherSystem(virtualPath, PathParser);
// the contents of virtualPath:
// / -- Prohibited
// /abc -- Prohibited
// '' (empty) - representing the root directory
// readme.txt
// abc/def
// abc/def/readme.txt
if (PathParser.IsAbsolutePath(virtualPath, false))
{
throw new MapPathException($"The path \"{virtualPath}\" returned by MapPathPhysicalToVirtualImpl() is an absolute path.");
}
virtualPath = "/" + virtualPath;
// Add "/" prefix on the virtual path
// the examples of virtualPath:
// /
// /readme.txt
// /abc/def
// /abc/def/readme.txt
// Check if the virtual path returned by MapPathPhysicalToVirtualImpl() is absolute path again
virtualPath = PathParser.NormalizeDirectorySeparatorAndCheckIfAbsolutePath(virtualPath);
virtualPath = PathParser.NormalizeUnixStylePathWithRemovingRelativeDirectoryElements(virtualPath);
return(virtualPath);
}
public string MapPathVirtualToPhysical(string virtualPath)
{
if (virtualPath._IsEmpty())
{
return("");
}
// virtualPath must be UNIX-style absolute path
// /
// /abc/def
// /abc/def/
// /abc/def/readme.txt
// /abc/def/../readme.txt
// /abc/def/../../readme.txt
// /abc/def/../../../readme.txt
virtualPath = PathParser.NormalizeDirectorySeparatorAndCheckIfAbsolutePath(virtualPath);
// remove any dangerous relative directory strings
// / ----> / (unchanged)
// /abc/def ----> /abc/def (unchanged)
// /abc/def/ ----> /abc/def (the last '/' is removed)
// /abc/def/readme.txt ----> /abc/def/readme.txt (unchanged)
// /abc/def/../readme.txt ----> /abc/readme.txt (normalized for security)
// /abc/def/../../readme.txt ----> /readme.txt (normalized for security)
// /abc/def/../../../readme.txt ----> /readme.txt (normalized for security)
virtualPath = PathParser.NormalizeUnixStylePathWithRemovingRelativeDirectoryElements(virtualPath);
// remove the first letter
if (virtualPath.Length == 0 || virtualPath[0] != '/')
{
throw new MapPathException($"The normalized virtual path \"{virtualPath}\" does not an absolute path.");
}
virtualPath = virtualPath.Substring(1);
// the contents of virtualPath:
// '' (empty) - representing the root directory
// readme.txt
// abc/def
// abc/def/readme.txt
// converting the naming convention
virtualPath = PathParser.ConvertDirectorySeparatorToOtherSystem(virtualPath, UnderlayPathParser);
// the contents of virtualPath:
// '' (empty) - representing the root directory
// readme.txt
// abc\def
// abc\def\readme.txt
// Make sure the path is not an absolute
if (PathParser.IsAbsolutePath(virtualPath, true))
{
throw new MapPathException($"The virtualPath \"{virtualPath}\" must not be an absolute path here.");
}
// delegating to the derive class
string physicalPath = MapPathVirtualToPhysicalImpl(virtualPath);
// the contents of physicalPath:
// c:\view_root
// c:\view_root\readme.txt
// c:\view_root\abc\def
// c:\view_root\abc\def\readme.txt
return(physicalPath);
}